With violins in the background, Gaga jammed away on a white Yamaha piano. Later on in the song, several young adults — who displayed writing on their wrists saying “It’s Not Your Fault” — walked up to join the musician. Once the song ended, Gaga joined them as audience members cheered. Actress Rachel McAdams was shown tearing up.

Here’s what you need to know about Biden and Lady Gaga at the 2016 Academy Awards:

2. Los Angeles Traffic Is More Severe Due to Biden’s Presence

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Due to Biden’s arrival, Los Angeles has been facing more severe traffic jams, according to Daily Mail. On the Oscars’ website, the LAPD released a map of its streets and sidewalk closures for the Academy Awards. The closures were posted 21 days prior to the event.

5. Lady Gaga’s Dedicating Her Oscars Performance to Kesha

When Lady Gaga takes the stage to perform “Til It Happens to You,” she’ll have Kesha in her thoughts. A judge ruled despite Kesha’s sexual abuse allegations, it’s not a reasonable request to “decimate a contract that was heavily negotiated,” according to The Hollywood Reporter.

“You’re asking the court to decimate a contract that was heavily negotiated and typical for the industry,” Supreme Court Justice Shirley Kornreich told Kesha.

On February 19, the singer went up against Dr. Luke (Lukasz Gottwald),a songwriter-producer. Kesha alleges that Gottwald drugged and raped her 10 years ago and committed continued abuse. Kesha has been trying to get a preliminary injunction that would allow her to record music outside of Dr. Luke’s scope.